Twin 2-year-old brothers have died after apparently falling from an apartment in the central city of Nagoya, police said Saturday.

Toya and Yuya Mabe, who lived on the seventh floor of an apartment building in Naka Ward, were discovered in a parking lot next to the building. Police said they received a call around 3:55 p.m. Friday from a passer-by who informed them that a child had fallen.

The brothers were taken to a hospital but were pronounced dead. Their parents were inside their home at the time of the incident, according to the police.

The police found in an on-site investigation Saturday an item that could have been used as a step near a window of the apartment, an investigative source said.